How do I use std::count in C++?

Can you explain how to use std::count in C++?

Sure! std::count is a function in the C++ Standard Library that counts the occurrences of a specific value in a range.

What headers do I need to include to use std::count?

You need to include the <algorithm> header to use std::count.

Can you give me a code example?

Of course! Here's a simple example:

#include <iostream>
#include <vector>
#include <algorithm>

int main() {
    std::vector<int> vec = {1, 2, 3, 2, 4, 2};
    int count = std::count(vec.begin(), vec.end(), 2);
    std::cout << "Number of 2s: " << count << std::endl;
    return 0;
}

What if I want to count elements based on a condition?

In that case, you can use std::count_if, which allows you to specify a condition using a predicate.